本論文主要以雙腈中的戊二腈作為高電壓電解液，並加入單腈中的正丁腈來降低電解液黏度，且添加碳酸亞乙烯酯形成鈍化層避免鋰金屬和單腈反應，實驗利用掃描式電子顯微鏡觀察電解液對電極表面影響並以電化學儀器進行測試、分析與歸納以獲得雙腈和單腈最佳比例且利用高解析X-光電子能譜儀推測鈍化層生成物種，而在實驗測試中可發現當雙腈和單腈比為6:4時，且搭配5wt%碳酸亞乙烯酯為最佳比例，可測得氧化電位約在5.7 V，放電電容量在5C速率下為約80 mAhg-1 ，且在溫度為30 oC下，循環壽命測試中，放電電容量仍可維持第五次放電電容量的94.35%。

In this thesis, high-voltage nitrile-based electrolytes for lithium ion batteries were investigated. The electrolytes were composed of nitrile, dinitrile, and vinylene carbonate (VC) as an additive. Scanning electron microscopy showed the change of surface morphology of electrodes. The chemical compositions of the solid electrolyte interface were characterized by high resolution X-ray photo electron spectroscopy (HR-XPS). We found that the optimal ratio of dinitrile to nitrile is 6 to 4 by volume in terms of electrochemical performances. 5wt% VC as the additive has the enhanced electrochemical performances. The oxidation potential of the nitrile-based electrolytes can reach to 5.7 V. The discharge capacity of the Li||LiFePO4 cell with the nitrile-based electrolyte is about 80 mAhg-1 at a charge/discharge rate of 5 C under 30 oC, and its discharge efficiency after 100 cycles still keeps 94.35%.

摘要 i
Abstract ii
目錄 iii
圖目錄 vi
表目錄 xi
第一章 緒論 1
1.1 前言 2
1.2 一次電池和二次電池簡介 2
1.2.1 一次電池 2
1.2.2 二次電池 3
1.3 鋰電池歷史和工作原理 5
1.4 研究目的與動機 7
1.5 論文架構 8
1.6 參考文獻 9
第二章 文獻回顧 10
2.1 鋰電池基本組成 11
2.1.1 正極材料、負極材料 11
2.1.2 電解液 14
2.1.2.1 理想液態電解液所具備條件 14
2.1.2.2 有機溶劑電解液基本組成 15
2.1.2.3 有機溶劑電解液對固液介面層影響與介紹 24
2.2 參考文獻 25
第三章 實驗條件與步驟 29
3.1 實驗材料與藥品 30
3.2 實驗儀器與原理 31
3.2.1 實驗儀器 31
3.2.2 儀器原理 31
3.2.2.1 電化學分析儀 (Electrochemical Analyzer Instrument) 31
3.2.2.2 傅立葉轉換紅外線光譜儀 (Fourier transform infared spectroscopy，FT-IR) 33
3.2.2.3 核磁共振儀 (Nuclear Magnetic Resonance，NMR) 33
3.2.2.4 單晶X-ray繞射儀 (Single-crystal diffractometer) 34
3.2.2.5 場發射型掃描式電子顯微鏡 (Field-Emission Scanning Electron Microscope，FE-SEM) 34
3.2.2.6 高解析電子能譜儀 (High Resolution X-ray photoelectron Spectroscopy，HRXPS) 35
3.3 研究流程 36
3.4 電解液與極片製備 36
3.4.1 實驗電解液調配 36
3.4.2 正極材料極片(LiFePO4)製作 37
3.5 電化學測試條件 38
3.6 電池組裝步驟 39
3.7 電池性能測試步驟與條件 40
第四章 結果與討論 43
4.1 不同比例雙腈和單腈在添加碳酸亞乙烯酯之表現行為 44
4.1.1 電化學測試 44
4.1.1.1 直線掃描伏安法 44
4.1.1.2 離子導電度測試 52
4.1.1.3 循環伏安法 54
4.1.2 電池性能測試 58
4.1.2.1 電池充放電測試 58
4.1.2.2 電池循環壽命測試 62
4.1.2.3 AC交流阻抗測試 65
4.1.3 極片表面觀察 70
4.1.3.1 掃描式電子顯微鏡 70
4.1.4 結論 74
4.2 雙腈和單腈在添加不同碳酸亞乙烯酯量之表現行為 76
4.2.1 電化學測試 76
4.2.1.1 直線掃描伏安法 76
4.2.1.2 離子導電度測試 77
4.2.1.3 循環伏安法 79
4.2.2 電池性能測試 81
4.2.2.1 電池充放電測試 81
4.2.2.2 電池循環壽命測試 84
4.2.2.3 AC交流阻抗測試 86
4.2.3 極片表面觀察 90
4.2.3.1 掃描式電子顯微鏡 90
4.2.3.2 高解析電子能譜儀 94
4.2.4 結論 100
4.3 參考文獻 102
第五章 結論 103
5.1 總結 104
附錄 105

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